Self-air cooling abrading wheel

ABSTRACT

A self-air cooling abrading wheel having a flat annular web and an axially enlarged annular rim with a peripheral abrading surface thereon, and with a first series of elongated angularly related slots formed in said rim around its periphery extending inwardly of the rim for a portion of its width, said slots having air inlets adjacent said web and outlets extending radially outward of said rim, and a second series of said angularly related slots extending inwardly from the other side of said web, the slots of the second series being alternated with the slots of the first series and independent thereof.

United States Patent Gerhard R. Held Z2644 Shiell Drive, Mount Clemens,Mich. 48043 [21] Appl. No. 841,439

[22] Filed July 14, 1969 [45] Patented May 25, 1971 [72] inventor [54]SELF-A1R COOLING ABRADlNG WHEEL 4 Claims, 3 Drawing Figs.

3,376,673 4/1968 Metzgeretal.

Primary Examiner-William R. Armstrong Attorney-Cullen, Settle, Sloman &Cantor ABSTRACT: A self-air cooling abrading wheel having a flat annularweb and an axially enlarged annular rim with a peripheral abradingsurface thereon, and with a first series of elongated angularly relatedslots formed in said rim around its periphery extending inwardly of therim for a portion of its width, said slots having air inlets adjacentsaid web and outlets extending radially outward of said rim, and asecond series of said angularly related slots extending inwardly fromthe other side of said web, the slots of the second series beingalternated with the slots of the first series and independent thereof.

PATENTEU HAYZS I97! M? N mvemon es ARD anew BY M", inl y @411 ATTORN EYSBACKGROUND OF THE INVENTION In many grinding operations employing thepresent abrading wheel or related wheels, excessive friction developeswith excessive heating unless some practical means is provided foreffecting a cooling of the wheel, particularly at its peripheral surfaceportions.

Heretofore, various means have been employed for effecting such coolingsuch as the use of air jets or built-in attachments to the wheel itselfby which air may be directed so as to flow over the outer peripheraledges of the wheel for cooling the same.

BRIEF DESCRIPTION OF THE INVENTION The present invention has for itsprimary object the provision of a unit abrading wheel and wherein, meansfor effectively cooling the wheel in a self-air cooling operation areprovided.

It is another object to provide in such abrading wheel within the rimthereof and extending from opposite faces of the rim, a series ofelongated angularly related slots which project into the rim for aportion of its width which slots have air inlets adjacent the wheel weband have air outlets which terminate in the outer peripheral portion ofthe wheel to thus provide a continuous movement of air over and aroundand past peripheral portions of the wheel during the abrading operation.

It is another object of the present invention to provide spaced slotsthroughout the periphery of the abrading wheel at its rim projectinginwardly from the faces thereof on its opposite sides which slots haveair inlets adjacent the wheel web and have outlets which terminate inthe peripheral portions of the wheel and which slots extend onlypartially through the wheel to thus provide a continuous peripheralabrading surface.

These and other objects will be seen from the following specificationand claims in conjunction with the appended drawing in which:

FIG. 1 is a side elevational view of the present abrading wheel.

FIG. 2 is a section taken in the direction of arrows 2-2 of FIG. 1.

FIG. 3 is similar to FIG. 2 showing a modification.

DETAILED DESCRIPTION Referring to the drawing, the present abradingwheel is made of steel and is generally indicated at 11 and includes theflat annular web 12 of uniform thickness.

Said web includes hub 13 which is enlarged with respect to the web andprojects axially outward from opposite sides thereof and is apertured at14 adapted to receive the drive shaft for use in an abrading operation.

Said web terminates in the peripheral rim 15 which is provided with anouter peripheral carbide coating designated at 16. Said carbide coatingextends continuously over the outer axial portion of the wheel rim andthe parallel radial portions as designated at 16, FIG. 2.

The carbide coating and the means for applying same is disclosed in mycopending US. Pat. application, Ser. No. 804,511 filed Mar. 5, I969 andentitled, PROCESS FOR AP- PLYING HARD CARBIDE PARTICLES UPON A SUB-STRATE.

The automatic air cooling of the present abrading wheel is achieved byapplying to the opposite end faces of the rim a series of elongatedangularly related slots which extend into the rim sides for a portion ofthe thickness of the rim.

These slots are shown at I8 as extending into the body of the rim andadjacent portions of the web 12, FIG. I.

Each of the respective slots has an air inlet 20 adjacent said web andan elongated air outlet-which extends through the outer eripheralportion of the rim, FIG. 2, as at 19.

irst series of said elongated angularly related slots is formed upon oneside of the wheel rim as shown in FIG. I, and a second series of saidangularly related slots 18 is formed into the rim from its opposite sideas shown in FIG. 2. At times it will become necessary to use one seriesof slots 21 only, cut from one side of the wheel rim to its oppositeside as in FIG. 3.

It is noted that the'respective series of slots from the opposite sidesof the rim overlap but are alternated and are not in communication witheach other but extend throughout the wheel periphery. In some cases theslots 18, 22 have to be so arranged that they are in communication atthe web as indicated in dotted lines FIG. 1.

In the illustrative embodiment of the invention the elongated slots 18are arranged in an angle of approximately 45 with respect to a radialline which extends to the periphery of the wheel adjacent to said slots.

It is contemplated that this angle could be varied within the range of 0to 60, for illustration.

While under some conditions, the slot 18 may extend axially into the rimitself, it is contemplated that the said slots 18 extend at an acuteangle with respect to the wheel axis such as I best shown in FIG. 2.

Here the preferred angle is 30 though it is contemplated that this anglecould be varied within the range of 0 to 45 for illustration.

Size and the number of the respective grooves 18 will depend upon thedimensions of the wheel.

Best cooling effects are effected when the grooves are milled in onangles such as shown in FIG. 2.

OPERATION In operation on rotation on the present abrading wheel, aircurrents are created due to the use of the present slots 18, said airflowing from the inlets 20 adjacent to web 12 through the said slotsoutwardly through the outlets 19 at the rim periphery, no matter inwhich direction the wheel is turning.

Cooling air moves by centrifugal force through the said elongated slots18 from their inlets and their outlets and to some extent moves axiallyoutward of the said slots to thus provide a swirling of cooling airaround the complete peripheral portions of the rim where normallyheating is most prevalent.

I claim:

1. In a monolithic abrading wheel;

the improvement comprising:

a series of notches on one annular edge defining the intersection of theabrading wheel face and the wheel side; i the notches opening to boththe face and the side;

each notch being of considerable cross length, across the face, at leastapproximately halfway;

and of considerable side length, measured on the side towards the axisof the wheel; with the side length being greater than the cross length;

whereby, on wheel rotation, each notch will serve as an airscoop toscoop air from the atmosphere at the side of the wheel, into the sidepart of the notch, and outlet it to the face of the wheel, out from theface part of the notch.

2. A wheel according to claim 1 wherein the side part of each notchextends from the face towards the axis on a nonradial line.

3. A wheel according to claim 1 wherein there is a similar series ofnotches on the other annular edge of the wheel, with the two sets ofnotches being relatively staggered.

4. A wheel according to claim 2 wherein there is a similar series ofnotches on the other annular edge of the wheel, with the two sets ofnotches being relatively staggered.

1. In a monolithic abrading wheel; the improvement comprising: a seriesof notches on one annular edge defining the intersection of the abradingwheel face and the wheel side; the notches opening to both the face andthe side; each notch being of considerable cross length, across theface, at least approximately halfway; and of considerable side length,measured on the side towards the axis of the wheel; with the side lengthbeing greater than the cross length; whereby, on wheel rotation, eachnotch will serve as an airscoop to scoop air from the atmosphere at theside of the wheel, into the side part of the notch, and outlet it to theface of the wheel, out from the face part of the notch.
 2. A wheelaccording to claim 1 wherein the side part of each notch extends fromthe face towards the axis on a nonradial line.
 3. A wheel according toclaim 1 wherein there is a similar series of notches on the otherannular edge of the wheel, with the two sets of notches being relativelystaggered.
 4. A wheel according to claim 2 wherein there is a similaRseries of notches on the other annular edge of the wheel, with the twosets of notches being relatively staggered.